Electric fence energiser

A method of operating an electric fence energiser comprising causing the energiser to:

• send one or more low power evaluation pulse(s) along a fence line, sense a characteristic which is the voltage of said evaluation pulse(s) and set a threshold value based on said sensed voltage,
• send one or more further low power evaluation pulses along the fence line, sense a characteristic which is the voltage of the evaluation pulse(s), compare the sensed voltage to the threshold value, and when a change in the sensed voltage relative to the threshold value indicative of an animal in contact with the fence line is detected, send one or more but not more than a predetermined maximum number of higher power deterrent pulses along the fence line,
• subsequently send one or more further low power evaluation pulses along the fence line, sense a characteristic which is the voltage of the evaluation pulses, and either reevaluate and optionally reset the threshold, or set a new threshold value, and
• continue to send further low power evaluation pulses along the fence line and sense the voltage of the low power evaluation pulse(s) and compare the sensed voltage to the current threshold value, and send one or more further but not more than a predetermined maximum number of higher power deterrent pulses along the fence line if a change in the sensed voltage relative to the threshold value is again detected.

An electric fence energiser arranged to:

• send one or more low power evaluation pulse(s) along a fence line, sense a characteristic associated with said evaluation pulse(s) that varies with load on the fence line, and set a threshold value based on said sensed characteristic,
• send one or more further low power evaluation pulses along the fence line, sense a characteristic associated with the evaluation pulse(s) that varies with load on the fence line, compare the sensed characteristic to the threshold value, and when a change in the sensed characteristic relative to the threshold value indicative of an animal in contact with the fence line is detected, send one or more but not more than a predetermined maximum number of higher power deterrent pulses along the fence line,
• subsequently send one or more further low power evaluation pulses along the fence line, sense a characteristic associated with the evaluation pulses that varies with load on the fence line, and either re-evaluate and optionally reset the threshold, or set a new threshold value, and
• continue to send further low power evaluation pulses along the fence line and sense a characteristic associated with the low power evaluation pulse(s) that varies with load on the fence line, and compare the sensed characteristic to the current threshold value, and send one or more further but not more than a predetermined maximum number of higher power deterrent pulses along the fence line if a change relative to the threshold value is again detected.

An electric fence energiser arranged to:

• send one or more low power evaluation pulse(s) along a fence line, sense a characteristic which is the voltage of said evaluation pulse(s) and set a threshold value based on said sensed voltage,
• send one or more further low power evaluation pulses along the fence line, sense a characteristic which is the voltage of the evaluation pulse(s), compare the sensed voltage to the threshold value, and when a change in the sensed voltage relative to the threshold value indicative of an animal in contact with the fence line is detected, send one or more but not more than a predetermined maximum number of higher power deterrent pulses along the fence line,
• subsequently send one or more further low power evaluation pulses along the fence line, sense a characteristic which is the voltage of the evaluation pulses, and either re-evaluate and optionally reset the threshold, or set a new threshold value, and
• continue to send further low power evaluation pulses along the fence line and sense the voltage of the low power evaluation pulse(s) and compare the sensed voltage to the current threshold value, and send one or more further but not more than a predetermined maximum number of higher power deterrent pulses along the fence line if a change in the sensed voltage relative to the threshold value is again detected.